A certain isotope has a half-life of 32.4 hr and a relative biological effectiveness of 3.50. A sample of this isotope initially delivers an absorbed dose of 0.240 Gy to 250 g of tissue
(a) What was the initial equivalent dose to the tissue in rem and in sieverts?
(b) How many joules of energy did the 250-g sample initially receive from the isotope?
What will be an ideal response?
Answer: (a) 84 rem, 0.84 Sv (b) 0.060 J
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The person who first explained the discrete hydrogen atom spectrum was __________
Fill in the blank(s) with correct word
Compared to a single lamp connected to a battery, two identical lamps connected in series to the same battery will carry
A) more current. B) less current. C) the same current.
Hanna, at rest in her spaceship which is moving past Earth at 0.800c, observes a neutron at rest relative to her spaceship decay into a proton, an electron and a neutrino. She notes that the total momentum, 
, of the decay products is zero after the decay. According to an observer on Earth, the magnitude of the total momentum of the decay products, 
, is
A. 0. B. 0.600mn(0.800c) C. 0.800mn(0.800c). D. 1.00mn(0.800c). E. 1.67mn(0.800c).